Pressure-holding valve.



B. A. CHEW.

PRESSURE HOLDING VALVE.

APPLICATION FILED JAN. a, 190e.

Patented .1311.5, 1909.

2 SHEETB-SHEET l.

A A u l. n W@ B. A. CHEW.

PRESSURE HOLDING VALVE.

APPLIOATION FILED un. a, 190s.

- 909,061. Patented Jan.5,19o9.

2 SHEETS-SHEET 2.

A BENJAMIN 'AJ CREW,3 OF`AUGUBT, GEORGIA.A

PRE BSURIIBDLDIIIUVALVEI No. 9095061.'n

Speeiaatlbn of Leitern Paten/b.'

Application led January 8, 1908. Serial No. 400,800.

To all whomAit-may lcan/cern:

Be it known that 1I,.BENJAM1N A. CREW, a citizenof theUnited Statesfresiding at \Au gusta,l inthe .county of Richmond and vState ofGeorgiafhave invented new anduseful Im provements in.Pressure-Holding Valves, of which the `folloWingis a specification;

This inventionrelates to ressure-holding valves of that type intended) for usein con nec-tion Withapparatus ada ted tocontain compressible or :mcompressi leffluids under pressure and the invention relates more particularly to =a valve of this character designed for use in connectionf-witha. charging device whereby fluidl containing, apparatus can-` be re-charged .fromf time totime'without any escape iof- -luidf and. loss Vof `pressure through the valve tothe atmosphere.

The invention-has for one of vits objects to improveandfsimplify the construction and operation of devices 0f this character s0 as to be easy and .inexpensive to manufacture, thoroughly reliable and eiiicient in use, and readily mani ulated.

A further o j eet ofthe invention is the rovision of a` pressure-holding device inclu ing a valve whichf'is adapted to be positively locked on its seat and which can be removed or opened by a charging means that contains a valve that o erates to prevent a fall in pressure when tbe valve of the said device is opened.

Another-object of the invention is to provide a valve mechanism-which is admirably adapted for pneumatic tires for automobile wheels and the like, which is ca able of being readily manipulated and to w ich a pump can be readily attached or detached without a loss of pressure when it is desired to pump up a tire.

With these objects in View and others, as will appear as the description proceeds, the invention comprises the various novel features Aof construction and arrangement of arts which will be more fully described heremafter and set forth with particularity in the claims appended hereto.

ther accom anying drawings, which illustrate oneof t e embodiments of the invention, Figure 1 is a. central longitudinal section through the valve mechanism show.- ing the charging; device in position and ready to supply luid under pressure. Fig. 2 is a similar view showingthe charging device moved. Feig representsthe various parte disassembl l and infside elevation Figt4-is afr-agmentary'view offa portion'ofa neu matic tired. wheel with.y the pressure-ho din valve-applied thereto.A Fig. 5 isanenlarg sectional viewo` thevalve device adapted for pneumatic tires. Fig. 6 isl alsimilanview of such. .valve showing the charging l:device applied Fig.- 7 4is asimilar viewfoffa valve o 1 modified designl adapted. for fatstreet or re-plug.

Similar reference-characters are employed todesignate corresponding-parts throughout the several views.

Referring `to the drawings, A'designatesf a casing of any suitablamateriahl sizef'and shape, but preferably in. the =form|of a'cylim der openfat the end 1 and havin andnternal thread 2, whilethe opposite fendasfahollow nipple 3 externally threaded for. connection Wit a pi e or other object 4 whichis adapted to ho d fluid under pressure.. Arranged Within the casing A is a capfshaped valve B provided with a boss 5-that is ada tedeto enter the nipple orsneck 3, and the at surface 6 ofthe valve is adapted to seat on-the shoulder 7 of the casing A so as'te forma perfect seal and plrevent leakage past the valve. The capL as an annular flange-8 which is adapted to be engaged by theinner end 9 of a valve locking and withdnawin sleeve C which is provided with an extern right-hand thread 10 engaging-fthe thread'2 E of the casing, whereby the said sleeve-is adapted to positivel hold thevalve B against the seat. T e inner end ot. the sleeve has an internal thread lLwhieh. is

thread 12 of t e valve, so that connection with the latter can be effected forfzseatingcr l unseating the valve, and the lcuter endof. the member C is provided with a Acircumferential flange 13 which bears on thefend. of the casing A so as to assist in preventing leakage of luid from the casing.

A chargingdevice designated generally by D is adapted to be inserted intothe-member C when it is :desired to supply pressure to the pipe 4, andt `s device-comrisesa cylindrical bodyor-.member 14 that has its inner end formed intofanozzle,..the extremity of which is providedwwithan exterior .left-hand thread 1 5y that isadapted to inl elevation and :partially inserted ors rei adapted to en age the externalright-hand uidunder.

la removable valve cage 17 provided with a seat 18 for receiving the ball valve 19 which is adapted to open inwardly under the pressure of fluid acting inwardly-on the same, as in re-charging the conduit 4, and which is adapted to seat bythe rpressure acting outwardly from the conduit 4 when the valve B is opened. The cage 17 -which controls the valve 19 is removably held in the member 14 as by means of' screw` threads, and it is'removed or inserted through the outer end of the member 14. This member 14 has an exterior right thread 2() which is adapted to engage an interior thread adjacent the outer end of the member C, and if desired, the member 14 may be rovided with an annular flange 21 which 1s formed with a cylindrical r1m 22 that is internally threaded to receive the right-hand external threads 23 on the flange 13 of the member C. By means of this construction, the fianges 13 and 21 can tightly engageeach other when the parts are in position for charging operation, so that leakage between the cylindrical member 14 and sleeve C will be avoided. The member 14 is connected with a source of fluid su ply in any suitable manner, as for instance, by a pipe 23 connected with ,the member by the coupling sleeve 24.

Normally, the parts of the valve mechanism are in the osition shown in Fig. 2 and in the outer end) of the sleeve C is a lug cap or cover (not shown) of any suita le form for the urpose of preventing dirt from entering tie valve, and leakage of iiuid from the conduit 4 is prevented by means of the valve B being locked on its seat. When it is desired to supply fluid to the conduit 4 for increasing t e ressure therein, the sleeve C is unscrewe outwardly to a suit able distance approximately from the position show in F1g. 2 to that of Fig. 1, and after the closing ca moved, the device is inserted into the sleeve C, and upon the threaded extremity of the member 14 enga ing the cap valve B, the device D is rotate anti-clockwise so as to en age the threads 15 with the internal threa s of the valve. After the valve is fully screwed on the member 14T the valve can be removed from the sleeve C by a continuation of the turnin of the device D, thereby moving the va ve to the position shown in Fig. 1. As soon as the valve is disengaged from the sleeve C, the member 14 screws into the sleeve by the engagement of the threads 2O with the threads 20 Fig. 2, and when the member 14 is screwed home, the parts are in position to permit the charging operation to begin. It will be observed of the sleeve C is re-` that as soon as the valve lB is disengaged from the sleeve C, the pressure in the confIuit 4 will operate on the ball valve 19 and cause it to firmly seat so that there will be no leakage of fluid outwardlythrough the device D and pipe 23". A- pump or other source of pressure can then be connected With the pi e 23 and the supply of fluid will .open the a l valve 19, thereby permitting the fluid to pass through the ports 16, around the valve B, and into the conduit 4. After the desired pressure is reached, the .device D is unscrewed sufficiently to disengage the threads 20 from the threads 20gand cause the cap valve. to be screwedA into the sleeve C and after the valve is screwed in to the fuil extent, the member 14 will unscrewfrom the valve, thereby ermitting the device ,D to be withdrawn wit out danger of leakage of fluid, sincethe valveB closes the inner end of the member C. The member C is next screwed into the casing A to its full extent so as to cause the valve-Btc' firmly bear on its seat and thus effectivelyhold the pressure within the conduit 4. Y In Figs. 4, 5 and 6, is shown a modifica tion whereby the valvemechanism is adapted for use in connection with pneumatic tires for vehicle wheels. The casin E is provided with a cylindrical bore an is threaded throughout its len th, and screwing into the casing is a stem Fg that asses'through the wall of the tire G, there being' a head 25 on the inner end of the stem which cooperates with a flange 26 on the `casing E for clam ing the valve mechanism in position on tlie tire. Threaded into lthe outer end of the casing E is a locking member or sleeve H that has threaded engagement with the valve I that is adapted to seat at 27 against the inner end of the hollow stem F so as to prevent the escape of air outwardly throughthe bore of the stem. Arranged within the outer end' of the locking member His a dustexcludin plug 28 which is adapted to be removed w ienit is desired to charge the tire. The charging devicev J is substantially the same in principle andconstruction as that shown in Fig. 1, and it is provided with a left-hand thread 29 at its extremity that is adapted to screw into the valve. In prac tice, to um up the tire, the cap 28 is first removed) an the sleeve H run outwardly to a suitable distance, thereby removing the valve from the stem F. The .device J is next inserted into the member H and engaged with the valve so that the latter can be unscrewed from the member H and thereby render the device in condition for permittin air to be delivered to the tire. The bail valve in the device J prevents the air from escapin from the tire through the pump, but rea ily opens when the pump is set into operation so as to admit the air to the tire. After the tire is pumped up, the device J is attached to the the inner threade connection with the accompanying draweoaoei 3 between the inner en of a tubular member 2. The combination internally threaded at both/ ends, a valve unscrewed and at the same time the valve screwed into place in the member 8, which member is then screwed home so that the valve will be firmly seated. After this, the

dirt-excluding device 28 is replaced.` l adapted to screw into the inner end of the Referring to Fig. 7, K represents a service member, said valve being chambered and pipe with which is connected an ordinary l provided with an internal thread, the nipple street or ire plug L of any approved form, havin one end smaller than the other, a

the plug being provided with a valve casing l threa on the smaller end adapted to screw the plug into the valve,l a thread on the outer'end M which is fitted in an openin m and secured to the latter by olts 31. The adapted to screvsT into the outer end of the inner end of the casing forms a valve seat 32- 1 member', said threads being spaced apart for on which seats a valve 33. The valve has a l engaging the nipple with the valve before threaded stem 34 which screws intothe casl the nipple screws into the member,l and a ing M and the outer end of the casing is norl port in the nipple between the'said threads.

mally closed by a cap 35 indicated by dotted 3. rlfhe combination o'I' a casing internally lines. The device N for openingand closingl threaded and contracted at one end to form the valve is somewhat like the charging del, an annular seat, a valve of smaller diameter vice J hereinbefore described, except .that thanthecasing and disp the ball check valve within the device is disto engage the said seat, said valve having an pensed with. When the cap 35 is removed, f, internally and externally threaded body pord end'36 of the device N tion, a tubular member exteriorly threade screws into the valve 33 and after being thus i to screw into the casing' and interiorly valve, the threads 37 on the l threaded at both ends, said valve arran e device N engage the internal threads of the with its body screwed into the inneren of valve casing so that the continued turnin of the member, and a nipple threaded at both the device N will remove the valve andg at for screwing into the valve and into the the same time close the outer end of the caseffect the seating of the valve by ing by the flange 38 seating on the said end. d the A valve of this character can only be opened by means of a properly designed nipbple so that the fire plug cannot be opened y uni authorized ersons. Furthermore, the atl tachin of tie hose to the fire plug automatica ly opens the valve.

From the foregoing description, taken in l l serted in the sleeve and having t readed 'enl agement with the valve for removing the izatter ,from the sleeve, said device including means for preventing a back flow therethrough.

5. 'lhe combination of a casing, a seat '1 ends member to f turning of the nipple in the member an turning of the member in the casing.

4. 'l`he combination of a casing having an internal thread, a seat inthe casing, a valve adapted to engage the seat, a sleeve screwing into the casing and having threaded en a ement with the valve and adapted to loci t e latter on its seat, and a charging device ines of the construction and operation will be readily a parent to those skilled in the art to which t e invention appertains, and while I have described the principle of operation of the invention, to ether with the apparatus which therein, a valve adapted to en age the seat, I now consi er to be the best embodiment l acylindrical member movable ongitudinally thereof, I desire to have it understood that in the casing for seating and unseating the the apparatus shown is merely illustrative,

valve, a charging device ada ted to be 1nand that such changes may be made when sei-ted in the member, means desired as are witl I 1in the scope of the claims. connecting the device with the valve for dis- Having thus described the invention, what engaging the I claim 1sz latter from the member, a removable cage in the device, and a valve in 1. The combination of a tubular member the cage. interiorly threaded at both ends, a valve i In testimony whereof I affix my signature screwed into the inner end of the member, a in presence of two witnesses. nipple adapted to enter the outer end of the BENJAMIN A. CIIEW. member, spaced threads on the nip le for connecting the latter first with the vafve and then with the member to unseat the valve,

ings, the advanta of the method o Witnesses:

WM. VO. TANNER, J ULIA WEED HARRrss.

osed within the latter y roo 

